Defensive publication

ABSTRACT

PRODUCTION OF MOLTEN AMMONIUM PHOSPHATE MELTS CONTAINING FROM ABOUT 2 TO 24 PERCENT OF THEIR P2O5 AS POLYPHOSPHATES WITHOUT A DRYING STEP OR A MECHANICAL WORKING STEP. THE MELT CAN BE SOLIDIFIED IN A VARIETY OF GRANULATING APPARATUS SINCE SUBSTANTIAL AMOUNTS OF MECHANICAL SHEAR TYPE ENERGY ARE NOT REQUIRED WHEN THE POLYPHOSPHATE CONTENT OF THE MELT IS MAINTAINED BELOW ABOUT 25 PERCENT, AS TAUGHT IN U.S. PAT. 3,578,433, BOTTAI ET AL., MAY 11, 1971, COLUMN 4, LINE 32 ET SEQ. SUBSEQUENT WORK INDICATES THAT THE VALUE OF LESS THAN ABOUT 25 PERCENT OF THE P2O5 AS POLYPHOSPHATE REQUIREMENT TO ELIMINATE THE NECESSITY OF APPLYING MECHANICAL SHEAR ENERGY TO THE MELT AFTER IT IS FORMED AND BEFORE IT IS COOLED AND PROCESSED TO AMBIENT TEMPERATURES MAY VARY SOMEWHAT OVER THE RANGE OF BETWEEN ABOUT 20 AND 30 PERCENT. SUBSEQUENT WORK INDICATES THAT AS LONG AS THE RANGE IS FROM ABOUT 2 TO ABOUT 20 PERCENT POLYPHOSPHATE IN THE MELT THE REQUIREMENT FOR MECHANICAL WORKING IS COMPLETELY ELIMINATED; THAT WHEN THE MELT CONTAINS MORE THAN 30 PERCENT OF THE P2O5 AS POLYPHOSPHATE MECHANICAL WORKING MUST BE UTILIZED; AND THAT WHEN THE MELT IS BETWEEN ABOUT 20 AND 30 PERCENT POLYPHOSPATE, THERE IS SORT OF A GRAY AREA WHERE SOME MELTS, DEPENDING ON THE TYPE AND SOURCE OF ACID USED IN PREPARING SAME, WILL REQUIRE MECHANICAL WORKING WHEREAS OTHERS WILL NOT.

DFENSWE PULlUAlQN UNITED STATES PATENT OFFICE Published at the requestor the applicant or owner in accordance with the Notice of Dec. 16,1969, 869 O.G. 687. The abstracts of Defensive Publication applicationsare identified by distinctly numbered series and are arrangedchronologically. The heading of each abstract indicates the number ofpages of specification, including claims and sheets of drawingscontained. in the application as originally filed. The files of theseapplications are available to the public-for inspection and reproductionmay be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits oi. alleged invention. The Patent Oiflce makes no assertion as tothe novelty of the disclosed subject matter;

PUBLISHED AUGUST 8, 1972 T901,023 PRODUCTION OF AMMONIUM PHOSPHATEHorace C. Mann, Jr., 1942 Holiday Drive, Florence, Ala. 35630Continuation-impart of application Ser. No. 754,465,

Aug. 21, 1968. This application Sept. 23, 1971,

Ser. No. 183,268

Int. Cl. C0511 7/00 [1.5. Ci. 71-34 No Drawing. 22 Pages SpecificationProduction of molten ammonium phosphate melts containing from about 2 to24 percent of their P 0 as polyphosphates without a drying step or amechanical working step. The melt can be solidified in a variety ofgranulating apparatus since substantial amounts of mechanical shear typeenergy are not required when the polyphosphate content of the melt ismaintained below about 25 percent, as taught in US. Pat. 3,578,433,Bottai et al., May 11, 1971, column 4, line 32 et seq.

Subsequent work indicates that the value of less than about 25 percentof the P 0 as polyphosphate requirement to eliminate the necessity ofapplying mechanical shear energy to the melt after it is formed andbefore it is cooled and processed to ambient temperatures may varysomewhat over the range of between about 20 and 30 percent. Subsequentwork indicates that as long as the range is from about 2 to about 20percent polyphosphate in the melt the requirement for mechanical workingis completely eliminated; that when the melt contains more than 30percent of the P 0 as polyphosphatc mechanical working must be utilized;and that when the melt is between about 20 and 30 percent polyphosphate,there is sort of a gray area where some melts, depending on the type andsource of acid used in preparing same, will require mechanical workingwhereas others will not.

